Mold



J. c. MILLER 4 IOLD Aug. 4, 1931.

Filed Dec. 31, .1928 3 Sheets-Sheet l Jwwmlfoz JOHN C. MJLLER J. C.MILLER Aug. 4, 1931.

MOLD

Filed Dec. 31, 1928 a Sheets-Sheet 2 Ill/Ill gwventoo JOHN C. MIL/LIE]?J. C. MILLER Aug. 4', 1931.

MOLD

Filed Dec. 31, 1,928

3 Sheets-Sheet 3 J HN C: MILLER Patented Aug. 4, 1931 UNITED STATES PATNT, OFFICE, 1

JOHN c. MILLER, 01* CANTONMENT, FLORIDA MIOLD Application filed.December 31, 1928. Serial No. 329,633.

My invention relates to improvements in molds and particularly to suchas are adapted foruse in the manufacture of pottery in general andflower pots in particular, it being understood, of course, that theinvention is capable of other uses.

Briefly stated the invention has for an important object the provisionof a novel and improved mold which comprises a minimum number of verysimple and easily assembled parts, the nature of which eliminate thenecessity for clamps and fastenings.

' Another object of the invention is to provide a device of this kindwhich will be highly ,15 efficient in'practical use and which willenable high class work to be turned out with great rapidity,there beingprovided mounting means whereby the mold will be rotatably supported soas to facilitate tamping of plastic material therein.

Another object of the invention resides in the provision of a novelsupport for the work whereby the completed pot or'work can be strippedoff of the core without injury or the a z 2 exercise of unusual skilllvThe invention further-contemplates novel means for producing surfaceornamentation at the mouth of the work and means for holding theaforementioned means in operative position and proper assembly withtheother elements of the mold during the molding operation.

The invention also resides in certain novel features of construction,combination and arrangement of the various parts,-and' in modes ofoperation to be hereinafter de-.

mold assembled with a completed flower pot therein;

Figure 2 is a fragmentary cross-sectional view taken on the line 2--2 ofFigure 1;

' Figure 3 is a group perspective view of certain parts of the mold; j

Figure 4 is awperspective view of a completed flower pot made in themold.

Figure 5 is a vertical sectional view of a modification; a

Figure 6 is a top plan view thereof, and Figure 7 is a group perspectiveview of certain parts of such modification.

@ Referring specifically to the drawings,

numeral 5 denoted a base which is provided with a central upstandingboss 5 Suitably secured in the boss 5 and extending above the same is ahard steel rod 6, which serves as a pivot for the hub 8 of a spider8,-the hub 8 of said spider beingsupported upon the Figure 1 isaperspective view showing the boss '5 of thebase, as shown in Figures 1and 2. The spider is of the three-armed variety and has the ends of itsarms bent laterally upward, as indicated at 8".

The novel mold comprehends a crown-like core 9, which is preferably ofhollow construction withits upper or closed end roundedin'semi-spherical fashion as at 9 and pro- --vided with amedialhole 9for the reception of the pivot rod 6, previously referred to. The'core 9is supported upon fixed cleats 10 disposed upon the upper faces of thearms of the spider 8, as best shown in Figures 2 and '3, said cleatshaving studs 10 arranged tobe disposedwithin the core ,9 to preventshifting of thesame off the cleats. The advantage cleats 10 for spacingthe core 9 from the spider 8 is to assure the evensetting of the core,uninfluenced or disturbed by any accumulation of clay or. plasticmaterial th'at may perchance be disposed upon the upper surface of thespider arms.

Supportedin part by the outwardl tapered surface of the core9 and inpart y the upstanding ends 8 of the spider arms is the rin 1 1. It istobe noted that the inner edges the ring is beveledto conform totheawn-stave of the core 9,

Having applied the ring 11, as aforesaid, the semi-circular beaddefining ring seglnents 12 are disposed upon the ring 11 with their endsin contact. The outer' casing or shell 14 is now lowered into place. Itwill be noted that the shell or casing 9 has the general; outline orcontour of the core 9., except that adjacent its diametrically wider endit is provided with an off-set 1 1 to receive the ring segments 12.Figure 3 indicates that each ring segment 12'is provided" with radiallyextending lugs 13. The purpose of. these lugs 13 is to assure engagementof the end of said semi-circular segmentsor sections 12. This is securedby the clamping action of the enlarged mouth or end portion 1aof theshell 14. Thisportionengagesthe lugs 13and forces the ends of the ringsections 12 intoen'gagement. Of course there maybe any number of: ringsegments 12 to make up the'completed die or ring.

It is evident from the sh-owingin Figures '1 and 2 that the upturnedends 8 of the spider arms serve to guideand confine the shell ltin-placeandthereby hold the entire mold assembly against relativelateral dis placement.

It is importantto note at this time that since the shell supporting ring11 engages lateral spider arm ends 8 and core 9 it serves to hold thecorein place against later al shifting on the lugs 10. This is a veryadvantageous feature of the mold assembly and enables me'to eliminatethe cleat studs 10 ifl wish to do-so,although I prefer to retainthecleat studslO for the purpose of holding the core-in place pending.application of ring 11.

Having assembled the mold, as aforesaid, the plastic orother material istamped or poured into the space between the shell 14 and the core 9. Themounting of'the spider uponthe-base bossfi and about thestanda'rd or pin6 enabIesthe entire spider and mold to be rotated so thatmore efficient.tamping can be had and a better job. generally. produoed; Of course, thestandardfi' serves the function of. providing the, hole 15 in; thebottom of the completed. flower pct 15. Hn ing completed theformation'of. the pot l5 by. the tampingprocessinlan obvious way thecompleted 3' ob is ready for. removal from the mold;

Removal: of the pot 151 from: the: mold is effected by first removingthe shell 14. The

ring segments 12 can be left. in place. The ring 11. is now. grasp-edand lifted up, thus stripping the pot. 15 frolnthe core '9: The

ring segment 12 cannow be removed.

Itis desired t'ostate that the core 9' will necessarily be. of very.heavy material: so

that it will;maintain1its seate de position upon the spider; while thepot. is being lifted: off through. the instrumentality of; the ring, 11.

It is believed from thefore'goingdescription, taken in connection withthe accompanying drawings, that the novel features and advantages of theinvention will be readily apparent to those skilled in the art.

The rib 12 of ring segments 12 produce the bead or groove 15 in the pot,as shown, and many other designs may be had by placing other rings ofdifferent figures or designs asthesecan be made in segments of a and 6to allow, their removal.

In Figure a'modified form of the invention is shown illustrating itsapplication to the manufactureof square vessels or vessels which will beofsuch form that the outer shell cannot be slid off of the completedvessel. Here the'stan-d'or base has the central boss 21 carrying t he.upslanding hard metal rod 22 corresponding toelements 5,. 5 6 inFigure2. 23 designatesthe hub of'the spider havingthearms 24: of whichther-eare four instead of three, as in- Figure 3: The plane surfaced coremember 27. rests upon cleats QGcarried by the armss24l? and risingfromthe cleats are studs 28 adapted to be disposed adjacent the innersurfaces of the wall'of; the

core 27' to prevent any substantial lateral shifting of. the core on thecleats. In. this formof the inventioninstead of the ring 11 of- Figure3, I employ the frame-like pallet. 29

which issupported by the outwardly flanged walls of the core 27'and theupturned: outer ends24fof the spider arms 2-1; The pallet or framemember 29 supports the sectional: shell member which.comprisesintheillustrated ins ance four sections 31 which. are compound ly andotherwise curved in the direction. of

their length (or hasdies), thusmaking'it impossible to slide'thecomposite shell,.made up of said sections, off of the completed pot uponthe core 27. Intermediate the ends"' side edges of adjacent sections 31:to lie in flat contact. In order to clamp: the assembledssections 31together, I employ a-ring or annulus 33 which may comprise hingedsections butwhich inthe present. instance is shown integral: The ring 33has. inwardly projecting confining lugs 34: which. are

adapted toseat. outwardly of the pair of lugs of. adjacent sections 31at each corner. of: the shell formed by said'sections. Since in thepresentinstance the composite shell 31, 31,

etc, isshown witha decided fiare outwardly of'its upperportion, asshownlinlposition on the mold, the ring 33.can beforced'downwardlytoclamp thesection lugs 32 so as to rigidly hold theassembled shell in assembled condition while the: plastic material isdis- One of the upturned spider posed between the shell and the core todefine the vessels 36. Manifestly, the inner surface of the sections 31comprising the outer shell may be ornamented in any preferred manner soas to give the exterior of the pct 35 any predetermined ornamentalbeading or'figuring. I I

On completing of the molding operation the ring 33 is removed and thesections 31 taken out whereupon the completed pot can be stripped fromthe core 27 to elevation of the frame or pallet 30. as will be evident.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. The combination of a mold comprising a base, a support rotatablyjournalled upon said base, a core carried by said support, said supporthaving extensions extending beyond said core on two sides thereof, saidextensions having lateral confining flanges, a work supporting memberremovably carried by said core and surrounding the same, dies adapted tobe supported by said work supporting member for effecting anornamentation of the work, and a shell adapted to be disposed about saidcore and supported by said work supporting member, the shell and corebeing spaced to receive the plastic molding material, and the lateralends of said extensions engaging said shell to maintain the sameconcentric with said core.

2. A mold comprising a support, a core removably mounted on saidsupport, a shell adapted to be disposed about said core, means forclosing the space between said core and shell at the end adjacent saidsupport, said means providing a support for said shell, die meansremovably supported upon said space closing means, and said die meansbeing confined by said shell.

, 3. The combination set forth in claim 2,-' and said space closing andshell supporting means being removable to strip the completed moldedarticle from said core.

4. The combination set forth in claim 2, said space closing and shellsupporting means being movable relatively of said core to strip themolded article therefrom, and said base having means cooperating withsaid core for confining said means and shell in a predetermined relativeposition with respect to said core. a

5. The combination set forth in claim 2,

and including dies carried by said aforementhe core, and said basehaving means engaging the outer surface of said shells to preventshifting of the assembly relative of the base.

8. A mold comprising a support, a core removably mounted on saidsupport, a shell adapted to be disposed aboutsaid core, means forclosing the'space between said core and shell at the end adjacent saidbase, said means providin a support for said shell, die means removabiy' supported upon said space closing means.

In testimony whereof I aflix my signature.

I JOHN C. MILLER.

